[1] UNIV MINNESOTA, DEPT PEDIAT, DIV ENDOCRINOL METAB, BOX 391, MINNEAPOLIS, MN 55455 USA
[2] UNIV MINNESOTA, DEPT BIOCHEM, MINNEAPOLIS, MN 55455 USA
[3] UNIV MINNESOTA, DEPT GASTROENTEROL, MINNEAPOLIS, MN 55455 USA
[4] UNIV MINNESOTA, CTR LIVER, MINNEAPOLIS, MN 55455 USA